1994 MITSUBISHI 3000GT ESP

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LiENGINE ELECTRICAL
- lanition Svstem16-37
--7EL0134IGNITION SECONDARY VOLTAGE WAVE-FORM
CHECK
MEASUREMENT METHOD
(1) Clamp SECONDARY PICKUP around spark plug cable.
NOTE
1.The ignition voltage peak appears reversely betweenwhen the spark plug cables of the cylinders
No.4,
No. 5 and No. 6 are clamped and when those of thecylinders No. 1, No. 2 and No. 3 are clamped.
2. Since the
2-cylinder simultaneous ignition system is
employed, the wave-form for two cylinder appears
group by group when the wave-form is observed.
(Cylinder No. 1- cylinder No. 4, cylinder No. 2 -cylinder No. 5 and cylinder No. 3
- cylinder No. 6
as the respective groups) Here, the wave-form is
observed for the cylinder whose spark plug cable is
clamped with the secondary pickup.(2) Clamp the spark plug cable with the trigger pickup.
NOTE
1. Clamp the spark plug cable of the cylinders No.1,
No. 2 or No. 3 which belongs to the same group of
the cylinders clamped with the secondary pickup.2. Though it is difficult to isolate the cylinder of the
wave-form, the wave-form of the cylinders clampedwith the secondary pickup is stable. Use this as a
reference for isolation.
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CHASSIS
ELECTRICAL
CONTENTS
AERO PARTS (ACTIVE AERO).....Refer to GROUP 51
ANTI-LOCK BRAKING SYSTEM....
Refer to GROUP 35
BATTERY...........................................-3
ON-VEHICLE SERVICE............................3
Battery Charging.................................4Battery Inspection................................3Battery Testing Procedure........................5
SPECIFICATIONS................................-3
General Specifications............................3
CIGARETTE LIGHTER.............................119
CIGARETTE LIGHTER..........................123
SPECIFICATIONS..............................
119
General Specifications............I...........119
TROUBLESHOOTING............................120
COLUMN SWITCH.................................
.lll
COLUMN SWITCH*............................112
SPECIAL TOOL.................................111
SPECIFICATIONS...............................111
General Specifications..........................111
CRUISE CONTROL SYSTEM . . . . . . . Refer to GROUP 17
DOOR GLASS AND REGULATOR
(POWER WINDOWS) . . . . . . . . . . . . . .Refer to GROUP 42
DOOR HANDLE AND LATCH
(CENTRAL DOOR LOCKING) . . . . . . Refer to GROUP 42
DOOR MIRROR (ELECTRONIC
CONTROLLED MIRROR). . . . . . . . . . .Refer to GROUP 51
ELECTRONIC CONTROL
SUSPENSION . . . . . . . . . . . . . . . . . . . . Refer to GROUP
338
FRONT SEAT (POWER SEAT) . . . . Refer to GROUP 52A
HEATER AND AIR CONDITIONING . Refer to GROUP 55
HORN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
115
HORN SWITCH* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
RELAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
118
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
115
General Specifications . . . . . . . . . . . . . . . . . . . . . . . .115
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . .115
KEYLESS ENTRY SYSTEM
(CENTRAL DOOR LOCKING) . . . . . . Refer to GROUP 42
CONTINUED ON NEXT PAGE
WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
WARNING!
(1) Improper service or maintenance of any component of the
SRS, or any SRS-related component, can lead to personal
injury or death to service personnel (from inadvertent firing of the air bag) or to the driver and passenger (from render-
ing the SRS inoperative).
(2) Service or maintenance of any SRS component or
SRS-related component must be performed only at an authorized
MITSUBISHI dealer.
(3)MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
TSupplemental Re-
straint System (SRS) and GROUP 00 -Maintenance Service before beginning any service or maintenance of any com-
ponent of the SRS or any
SRS-related component.
NOTE
The SRS includes the following components: impact sensors, SRS diagnosis unit, SRS warning light, air bag module, clock spring
and interconnecting wiring. Other SRS-related components (that may
h,a”” to be removed/installed in connection with SRS serviceor maintenance) are indicated in the table of contents by an asterisk ( ).

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CHASSIS ELECTRICAL - Radio and Tape Player
RADIO AND TAPE PLAYER WITH ANTI-THEFT SYSTEM
lWhen power supply is reconnected after set has been removed from vehicle (after BATT line of sethas been disconnected for more than one hour), what can be effectively performed is only supply
of power made by POWER button operation. (If power supply is connected within an hour, operating
state before disconnection of power supply is resumed.)
IGN key of vehicle is in ACC position and set is in no displaystate.
No displayAbnormal segment op-
*[Faulty
tIs it possible to set identifiNom-Faulty
Yes
Is a beep heard and then does radio operate when PROG button
is placed to ON position after setting four-digit identification numberIs a beep heard and “1 Err” displayed for two seconds before
No
displaying “code”?cFaulty set
No
tCheck if identification number on card is input and set correctly.
Is a beep heard and then does radio operate when PROG button
is placed to ON position after setting four-digit identification numberon card aaain?
Yes-----+ NomxJ (Error made in input during first setting)
I
NoIs a beep heard and “2 Err” displayed for two seconds before
displaying “code”?Faulty set
YesPress POWER button to erase “code” (to change to no display
state).
I
YesContinued to next page.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-159
CHARTA. NOISE
A-l
Noise appears at certain places when traveling (AM).Is there a particular
stFind out the following information from the user:
1. Place
h YesDo the following measures eliminate the noise?
1. Change to a different station with a strong signalto boost resistance to interference.
2. Suppress high tones to reduce noise.
No
2. Locality conditions (valley, mountain, etc.)3. Name and frequency of stations affected by noise
tIf due to vehicle noise:
It may not be possible to prevent noise if the
signal is weak.
-I
t1 If due to external noise:
In almost all cases, prevention on the receiver
Weak signals especially are susceptible to inter-
i
tIf there is more noise than other radios, find out the noise conditions
and the name and frequency of the receiving stations from the user,and consult with the service center.
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A-6There is noise when starting the engine.
Noise type
Sounds are in pa-
rentheses ( ).
AM, FM:
Ignition noise
(Popping, Snap-
ping,Cracking,
Buzzing)
Otherelectrical
components
Static electricity
(Cracking, Crin-
kling)
Conditions
0Increasing the engine speedcausing the popping sound tospeed up, and volume de-creases.0Disappears when the ignitionswitch is turned to ACC.
-
lDisappears when the vehicle is
completely stopped.Occurs when parts or wir-
Severe when the clutch is en-ing move for some reasonlgaged.and contact metal parts of
the body.
lVarious noises are produced de-pending on the body part of thevehicle.
Due to detachment from
the body of the front hood,
bumpers, exhaust pipe
and muffler, suspension,
etc.
Causel
Mainly due to the
spark plugs.l Due to the enginenoise.
Noise may appear as
electrical components be-
come older.
Parts to be Location of
inspectedparts
or remedy(next page)
Noise con- 1
denser
Ground
cable2, 3
Repair or replace electricalcomponents.
Return parts or wiring to
their proper position.
Caution
1.Connecting a high tension cable to the noise
filter may destroy the noise filter and shouldnever be done.
2.Check that there is no external noise. Since
failure to do this may result in misdiagnosis
due to inability to identify the noise source,
this operation must be performed.3. Noise prevention should be performed by
suppressing strong sources of noise step
by step.
NOTE
1. Condenser
The condenser does not pass D.C. current, butas the number of waves increases when it
passes A.C. current, impedance (resistanceagainst A.C.) decreases, and current flow is
facilitated. A noise suppressing condenser
which takes advantage of this property is in-
serted between the power line for the noise
source and the ground. This suppresses noiseby grounding the noise component (A.C. or
pulse signal) to the body of the vehicle.
2. Coil
The coil passes D.C. current, but impedance
rises as the number of waves increases relativeto the A.C. current. A noise suppressing coil
which takes advantage of this property is in-
serted into the power line for the noise source,
and works by preventing the noise componentfrom flowing or radiating out of the line.
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Ground parts by bonding.
Cases where the problem
is not eliminated by a single
response to one area are
common, due to several
bodypartsbeing
imperfectly grounded.

Downloaded from www.Manualslib.com manuals search engine 54-168CHASSIS ELECTRICAL - Radio and Tape Player
IA-9Ever-present noise.I
Noise is often created by the following factors, and
often the radio is OK when it is checked individually.l Traveling conditions of the vehicle
l Terrain of area traveled through
l Surrounding buildings
l Signal conditions
l Time periodFor this reason, if there are still problems with noiseeven after the measures described in steps A-l
to A-8 have been taken, get information on the fac-
tors listed above as well as determining whetherthe problem occurs with AM or FM, the station
names, frequencies, etc., and contact a service cen-
ter.B. RADIO
IB-lNo power is supplied when the switch is set to ON.IIIIs multi-purpose fuse No. 4 blown or is the circuit open?Replace fuse or repair harness.
NoIs the connector at the back of the radio connected properly?
Yes
Connect connector securely.1t
NoDisconnect and check the connector at the rear of the radio. Is the ACC / Repair harness.
power (12 V) being supplied to the radio?J
I
Yes
1 Reoair or reolace radio.
1 B-2No sound from one speaker.ICheck to see if there is any sound when attached
to another radio.
I-=----[Repair or replace radio unit.
No
checkthespeakerharnessfor conductance.
out.*Speakarj
NoRepair speaker harness and ensure
proper connection of relay connectors.
tRepair or replace speaker.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-173C. CASSETTE PLAYER
C-lCassette tape will not be inserted.Are there any foreign objects in the cassette player?/NoRemove the object(s)”
“1Attempting to force a foreign object (e g.. a coin or clip, etc.) out
of the cassette player may damage the mechanism. The player
should be taken to a service dealer for repair.
Does the cassette player work if another tape is inserted?
NoReplace tape
**
*2Ensure that the tape label is not that the tape itself tape of C-120
or greater length often get caught in the mechanism and should
not be used.
Repair or replace cassette player.
C-2No sound (even after a tape has been inserted).Is multi-purpose fuse No. 4 blown or is the circuit open?
NoYes
- Replace fuse or repair harness.
+Is connector at rear of radio connected tightly?
YesNo
- Connect connector firmly.
Disconnect connector at rear of radio. Is ACC power being supplied to the
yesPW Repair or replace caSSette player.
radio?
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CHASSIS ELECTRICAL - Radio and Tape Player
C-3No sound from one speaker.t
YesReplace the cassette player and check again.
NoRepair or replace cassette player.
thespeaker harness for conductance.___c It conducts electricity but isshorted out.
+Check the speaker for conductance.
NoRepair speaker harness and ensureproper connection of relay connectors.
tRepair or replace speaker.
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